Power Dissipation Analysis for Multi-level Dynamic Voltage Restorer

Because of the characters of multi-level Dynamic Voltage Restorer(DVR),the power dissipation of DVR is greatly different for the device operating in compensation mode or standby mode.In the standby mode,only the multi-winding transformer exciting core dissipation and IGBT conducting loss will be calculated.In the compensation mode,both core and copper losses of multi-winding transformer,loss of diodes in rectifiers,switching loss and conducting loss of IGBT in the Boost circuits and in the inverters should be calculated.Employing the loss characteristic curves provided by manufactures and the power loss calculation program developed by authors,we have found the inverter′s dissipation for the proposed DVR in compensation mode and standby mode.